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E.GRUND. GAR GOUPLING. v

No. 486,375. Patented Nov. 15, 1 892.

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(No Model.) E. GRUND.

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No. 486,375. Patented Nov. 15, I892.

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NITED STATES PATENT FFICE.

EMIL GRUND, OF COLOGNE, GERMANY.

CAR-COUPLING.

SPECIFICATION forming part of Letters Patent No. 486,375, dated November15, 1892.

Application filed April 22, 1892. Serial No. 430,231- (No model.)

To all whom it may concern:

Be it known that I, EMIL GRUND, a subject of the Emperor of Germany,residing at Nippes, near Cologne, in the Kingdom of Prussia and GermanEmpire, have invented a new and useful Improvement in Railway- OarCouplings, of which the following specification, taken in connectionwith the accompanying drawings, is a full, clear, and exact description,such as will enable those skilled in the art to make and use the same.

My invention relates to an improvement upon the screw-coupling now inuse by the Railway Union Association, by means of which the frequentdamage to the couplings is avoided.

In the accompanying drawings, Figure I represents in side elevation thecommon form of screw-coupling now in use. Fig. II is a plan view of oneform of my improved coupling. Fig. III is a side elevation of the same.Fig. IV is a side elevation of a slight modification.

The common form of screw-coupling now in use (shown in Fig. I) is liableto frequent distortions and breakages in its dilferent parts, whichrender it unservioeable. This result is due to the frequent and severeconcussions to which the cars are subjected while being coupled orbraked in stopping and going downgrade.

Referring to Fig. I, when the brake is put on or during the couplingwhen two cars collide the pulling-hook h, which is hung from the car,catches with its upper part g against the end of the coupling-loop d,which is swiveled to the screw-nut w, adjustably mounted on thecoupling-screw y. With a slight concussion the coupling operates verywell; but if the concussion is rapid and violent, as is generally thecase, the coupling in a state of tension will be held horizontal andwill give a direct thrust to the links in the line of motion of thecars, and the whole force of the concussion is borne by the screw,couplingloops, and hooks, and if the blow is sufficiently strong theybecome bent and otherwise permanently injured.

The above serious objection is entirely overcome by my improvedconstruction.

Referring to Figs. II, III, and IV, 3 is the coupling-screw, and 0c arethe screw -nuts mounted on the screw and formed with trunnions a forsupporting the coupling-loops. d are the coupling-loops, which (insteadof being formed with the simple swivel-eyes, as in the common form ofcoupling) are formed with inclined slots 0, fitting over the trunnions aand secured in place, so that the trunnions can slide backward andforward therein. The inclined slots 0 can be formed in both of thecoupling-loops d and i, if preferred. The form shown in Fig. III differsfrom the form shown in Fig.1Vin havingthe bearing-blocks e mounted onthe trunnions a and sliding in the slots 0.

The operation of my improved construction is as follows: l/Vhen the carscollide in the act of braking or coupling, the outer part of the hookengages the end of the coupling-loop and presses against it with apressure corresponding to the force of the concussion, which causes thetrunnions of the screw-nuts to slide in the inclined slots of the loopsand move the parts of the coupling from their previous horizontalposition, so that the direct thrust in a horizontal direction is avoidedand further pressure cannot be effected except in an oblique direction,and hence the buffers alone bear the brunt of the concussion.

My improvement not only prevents the bending and injuring of thecoupling, but prevents the automatic unhooking of the loop from the hookat the time of concussion.

Having thus described my invention, what I claim as new therein, anddesire to secure by Letters Patent, is

1. In a car-coupler, the combination of a coupling pin or screw, acoupling-loop formed with inclined slots engaging suitable projectionscarried by the pin or screw, and a hook adapted to engage the loop, asset forth.

2. In a car-coupler, the combination of the coupling-hook, the couplinglink or screw, the nut carried by the pin or screw and formed withtrunnions, and the coupling-loop formed with inclined slots in its ends,which engage able coupling-hook adapted to engage the the trnnnions,substantially as set forth. loop, substantially as set forth. 1o

3. In a car-coupler, the combination of the In witness whereof I havehereunto set my hook, the coupling-screw, the screw-nut carhand inpresence of two Witnesses.

5 I'ied by the screw and formed with trunnions, EMIL GRUND.

bearing-blocks mounted on the trunnions, a Witnesses: coupling loopformed with inclined slots FRITZ MI'iLLER,

which engage said bearing-blocks, and a suit- H. ALLEN MAXWELL.

